pho

<?php

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require ('phpmailer/vendor/autoload.php');
require ('functions/connect_database.php');

global $pdo;

    //date_default_timezone_set("Europe/Warsaw");

    //$lastday_current_month_date = date('Y-m-t');

    $sql = "SELECT *
    from sms_prices p
    join sms_students s on s.id=p.student_id
    join sms_users u on u.id=s.user_id
    where p.to_pay>p.payed
    ";

    $result = $pdo->prepare($sql);
    $result->execute();

    //$users_data = $result->fetch();
    //$stmt->execute();

while($row = $result->fetch())
{
    $to_pay = $row['to_pay'];
    $to_date = $row['to_date'];
    $payed = $row['payed'];
    $period = $row['period'];
    $email = $row['email'];

$mail = new PHPMailer(true);

try {
    //Server settings
    $mail->SMTPDebug = 2;
    $mail->isSMTP();
    $mail->Host       = 'smtp.zenbox.pl';
    $mail->Mailer = "smtp";
    $mail->SMTPAuth   = true;
    $mail->Username   = 'adreswysylki';
    $mail->Password   = 'hasło';
    $mail->Port       = 587;
    $mail->SMTPSecure = 'tls';

    //Recipients
    $mail->setFrom('adreswysylki', 'Soart');
    $mail->AddAddress($email);

    // Content
    $mail->isHTML(true);
    $mail->Subject = 'Przypomnienie o płatności';
    $mail->Body    = 'Witamy'
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}

}